Dover Imaje S7 Mega, Manual

Page: 130 / 154

128 A19620 C
Trouble shooting
5.2 Break-off point adjustment
Special tools :
• Bifocal magnifying glass.
• Hex head screwdriver 2 mm.
PREPARATION
1 - Place the head on the
maintenance stand.
Start the jet(s) and leave them
running for at least 1/2 an hour.
2 - Remove the upper plate and
the head cover.
In multi-jet printers, each jet has its
own potentiometer (right-hand jet-
right-hand potentiometer, etc.).
SETTING
3 - The setting below is performed
by looking at the jet through the
magnifying glass (see Figures 1
and 2):
• Initialize the operation by turning
the potentiometer fully to the left.
The jet is continuous.
• Turn it gently to the right until the
jet break-point appears in the
form shown in 4 on Figure 2.
• Only the shape of the drops after
the break point indicate the right
adjustment (see Figure 3).
Figure 3 :
Figure 1 :
1 - Potentiometer slot
2 - Magnifying glass
CHECKS AND TESTS
4 - Close the head covers. Clear
any faults.
5 - Perform some printing tests
and repeat the setting if necessary.
Figure 2 :
1 - Potentiometer turns
2 - Jet as seen through
magnifying glass
3 - Satellite droplet
4 - CORRECT SETTING
Wrong Right To avoid
1
2
During settings, handle the
potentiometer with care to
prevent damage.
4
3 2
1